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F = <a href="%pathto:mser.vl_ertr;">VL_ERTR</a>(F) transposes the frames F as returned by <a href="%pathto:mser.vl_mser;">VL_MSER</a>(). This
conversion is required as the VL_MSER algorithm considers the column
index I as the frist image index, while according standard image
convention the first coordinate is the abscissa X.
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See also: <a href="%pathto:mser.vl_mser;">VL_MSER</a>(), <a href="%pathto:vl_help;">VL_HELP</a>().
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